As one of the important and precise components of the bogie of a moving train, it is of great practical significance to study the precise, efficient and automatic cleaning technology. But the key components in the gearbox collector ring is very easy to rust, greatly affecting the quality of the gearbox, stability and the service life of the entire transmission system.
Collector ring parts of the cleaning quality of the moving car safety and stability has a vital impact, in the gear box inner bearing gland of the outer axle, installed on the collector ring (outer sleeve), grounding device carbon brush in the role of spring pressure and collector ring to maintain radial close, collector ring to collect the leakage current on the car, through the carbon brush, conductive plate conduction to the ground wire. Current conduction process from the collector ring, carbon brush, conductive plate, grounding conductor after the whole car grounding. Therefore, for the collector ring surface corrosion cleaning is of great significance, not only can greatly improve the service life, but also to ensure the safety of the entire operation of the train, and thus to find an efficient, high-quality cleaning method is essential.
For the collector ring, the existing cleaning technology is mainly high-pressure water cleaning method, mechanical cleaning method, chemical cleaning method, ultrasonic cleaning method and laser cleaning technology. However, these traditional rust removal methods have their own limitations, such as serious pollution, difficult to ensure the quality of cleaning, low automation and other problems.
As an emerging cleaning technology, laser rust removal technology has the advantages of high cleaning efficiency, good cleaning quality, green and easy automation, and has a wide application prospect. Using laser rust removal technology, laser rust removal process experiments were conducted on the surface rust of collector rings, and complete removal of surface rust was achieved, revealing the silver-white metal substrate.
According to the national standard GB8923-88, the original rusting degree of the collector ring specimen was judged, and it was found that serious rusting had occurred on the steel surface, so the rusting grade of the specimen was judged to be B grade. Due to the great thickness of surface corrosion, many pits were created in the material after the serious corrosion on the surface of the collector ring, which made the process of removing the surface corrosion extremely difficult, but after laser descaling and cleaning, it was found that the surface corrosion on the collector ring was completely removed and the base material was not damaged.
The surface cleanliness of the collector ring after the optimized process reaches the standard of Sa2, and compared with the surface of the original specimen with rust grade B, it has a good metallic luster, and there is no residual rust layer on the surface and no unstable bond, which achieves the cleaning effect.
Collector ring rust removal process, we use . The laser cleaning machine not only obtains a clean and uniform surface of the collector ring, so that the collector ring can work normally in the gear box and ensure the stability of the overall system, but also the whole laser rust removal process does not affect the basic mechanical properties of the collector ring surface, which cannot be achieved by traditional mechanical cleaning means. At the same time, after laser descaling, the conductive properties of the collector ring surface are restored to the conductive properties before rusting, so the laser descaling method has important application value for the surface descaling of the collector ring.
